What I generally do is make sure that the "thin" lawns get the pre-emergent right out the door. I will then go back in on my next app and put down a second shot of the same.
Your thicker, denser turf can wait longer for that first app, and you can be fairly sure that you will have excellent control, baring any factors, such as disturbing of the soil that would break the barrier, or improper application.
I don't worry about the timing of the forsythia...hell some were blooming in late February.
Your thicker, denser turf can wait longer for that first app, and you can be fairly sure that you will have excellent control, baring any factors, such as disturbing of the soil that would break the barrier, or improper application.
I don't worry about the timing of the forsythia...hell some were blooming in late February.